public static byte[] ComputeHMACSHA384HashFromFile(string filePath, byte[] authKey, long startPosition, long endPosition)
{
byte[] hash = null;
using (var fStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None))
{
fStream.Position = startPosition;
byte[] buffer = new byte[(1024 * 4)];
long amount = (endPosition - startPosition);
using (var hmacSha384 = new HMACSHA384(authKey))
{
while (amount > 0)
{
int bytesRead = fStream.Read(buffer, 0, (int)Math.Min(buffer.Length, amount));
if (bytesRead > 0)
{
amount -= bytesRead;
if (amount > 0)
{
hmacSha384.TransformBlock(buffer, 0, bytesRead, buffer, 0);
}
else
{
hmacSha384.TransformFinalBlock(buffer, 0, bytesRead);
}
}
else
{
throw new InvalidOperationException();
}
}
hash = hmacSha384.Hash;
}
}
return(hash);
}
public BDCrypto(string Password)
{
if (!Info.Moduls.Contains("Crypto/BDCrypto.cs"))
{
Info.Moduls.Add("Crypto/BDCrypto.cs");
}
OneKeyHasher Translator = new OneKeyHasher();
Encryption = new Dictionary <byte, byte>();
Decryption = new Dictionary <byte, byte>();
byte[] TMPStore;
using (SHA384Cng Seg2 = new SHA384Cng())
using (HMACSHA384 Seg1 = new HMACSHA384(Encoding.UTF32.GetBytes(Password)))
{
Seg1.Initialize();
Translator.TheHashSize = 512;
Translator.TheCharsetUsed = Encoding.UTF8;
TMPStore = Translator.Hash(Password);
Seg1.TransformBlock(TMPStore, 0, TMPStore.Length, TMPStore, 0);
Seg1.TransformBlock(TMPStore, 0, TMPStore.Length, TMPStore, 0);
Seg1.TransformBlock(TMPStore, 0, TMPStore.Length, TMPStore, 0);
Seg1.TransformBlock(TMPStore, 0, TMPStore.Length, TMPStore, 0);
TMPStore = Seg1.TransformFinalBlock(TMPStore, 0, TMPStore.Length);
TMPStore = Seg2.ComputeHash(TMPStore);
}
Translator.TheCharsetUsed = Encoding.Unicode;
Translator.TheHashSize = 255;
TMPStore = Translator.Hash(TMPStore);
int pos = 0;
byte tmp = 0;
while (true)
{
if (!Encryption.ContainsValue(TMPStore[pos]) && !Decryption.ContainsKey(TMPStore[pos]))
{
Encryption.Add(tmp, TMPStore[pos]);
Decryption.Add(TMPStore[pos], tmp);
if (tmp == 255)
{
break;
}
else
{
tmp++;
}
}
pos++;
if (pos == TMPStore.Length)
{
TMPStore = Translator.Hash(TMPStore);
pos = 0;
}
}
_Key = new byte[256];
Layers = 5;
byte x = 0;
while (true)
{
_Key[x] = Encryption[x];
if (x == 255)
{
break;
}
else
{
x++;
}
}
}
